In combat sports it depends on who trained harder and for what. It's skill mainly as opposed to brute strength. Usman beat Buckley by out wrestling him, it seemed like Buckley forgot that Usman was wrestler. So he lost by decision. I don't watch other non combat sports.
They did a show about it after the fight
In a hypothetical I think Jones beats anyone who isn't him. In boxing I don't even know any Nigerian boxers.
All in all beating someone in sports probably isn't as important as beating them in say business.